\begin{tabular}{l*{1}{c}} \hline                         &  \multicolumn{1}{c}{Colorado Party Affiliations (log)}   \\                         & (1)    \\
\hline 
1959-1963 $\times$ Avg. Betweenness&      0.2169***\\
                    &    (0.0444)   \\
1964-1968 $\times$ Avg. Betweenness&      0.1407***\\
                    &    (0.0296)   \\
1969-1973 $\times$ Avg. Betweenness&      0.0857** \\
                    &    (0.0333)   \\
1974-1978 $\times$ Avg. Betweenness&      0.1823** \\
                    &    (0.0712)   \\
1979-1983 $\times$ Avg. Betweenness&      0.1761** \\
                    &    (0.0688)   \\
1984-1988 $\times$ Avg. Betweenness&      0.1293***\\
                    &    (0.0404)   \\
 
\hline Observations &       1,870   \\
$R^2$               &      0.3881   \\
\hline \end{tabular}
